3-D Printed Circularly Polarized Modified Fresnel Lens Operating at Terahertz Frequencies

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Article number8676352
Pages (from-to)4429-4437
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number7
Online published29 Mar 2019
Publication statusPublished - Jul 2019


In this paper, a novel 3-D printed circularly polarized (CP) modified Fresnel lens antenna operating at 300 GHz is introduced. By virtue of the superior geometric flexibility of the 3-D printing technique, a modified Fresnel lens consisting of subwavelength discrete dielectric posts in the odd-numbered Fresnel zones is proposed. It is further demonstrated that by integrating dielectric anisotropic metamaterial, the modified Fresnel lens can realize CP radiation fed by a simple linearly polarized (LP) open-ended waveguide (OEWG). The 3-D printing approach is also investigated to push the performance envelops of the 3-D printer for realization of the terahertz CP lens. The measured results show that the axial ratios (ARs) of the fabricated antenna prototype are smaller than 3 dB from 265 to 320 GHz. Moreover, the modified Fresnel lens has a maximum gain of 27.4 dBic, which is 0.9 dB larger than that of the conventional Fresnel zone plane antenna (FZPA). These validate the concept, the design, and the fabricated prototype.

Research Area(s)

  • 3-D printing, circularly polarization (CP), lens, terahertz (THz)

Citation Format(s)